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Unit: 4.7

Adding and Subtracting Fractions

In this unit students

•  extend understanding of addition and subtraction of whole numbers to addition and subtraction of fractions with the same denominator;
•  use fraction equivalence in the special case of decimals.

Students extend their understanding of adding and subtracting whole numbers in order to perform the same operations with fractions that have the same denominator. They work with decomposing fractions into a sum of fractions, add and subtract mixed numbers, and solve word problems using these skills. Students work with decimals, using fraction equivalence in the special case of $\frac{a}{10} = \frac{a \times 10}{100}$ to understand, e.g., that $0.67 = \frac{6}{10}+\frac{7}{100}$.

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